Quote:
Originally Posted by Tiger Joe
I have seen an air bagged truck with no parking brake slide down a steep driveway when aired out.
it was a 70 c10 LWB. bagged and laid frame. owner aired it out as his parking brake. they got the truck stopped by jumping in a stepping on the brake.
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That's all the proof I need
. My only experience was with a bagged and body dropped truck that the engine couldn't even move when laid out...in retrospect the front tires where unable to rotate on said truck was laid out tho.
Quote:
Originally Posted by jocko
Mack, my edit was to add the note about 67 and later master cylinders providing redundancy in the system in case anyone wasn’t aware (forgot I was on the 60-66 board for a second...hang out on the 67-72 side as well). I am an engineer, but can’t really give you an exact number of how steep a grade would pose a risk - but tiger joe has provided a data point that should make anyone considering airing out as a substitute for a parking brake take pause. You do pose a good question on why the term emergency brake was used in the past. I’ve used it myself - interchangeably with parking brake, and indeed I’d use it as a last resort if a brake system failed. I guess my main point, which I could have worded better, is that if someone is going to spend money on an airba system, they can afford a parking brake - and if available funds cause one to choose between the two, then a parking brake should take priority - and air it out later. The OP asked a good question - airing out would keep the vehicle from rolling on fairly level surface, but joe provided some proof it won’t work for all surfaces.
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I'm all fairness I enjoy the discussion on these things, In my mind the op had a solid rational about ditching the e brake...My only stake in this is I have porterbuilt trailing arms on the way and I'm not sure there is a clean way to route the cables with these, even at that I considered a different style than total deletion.